FAST索网疲劳评估及高疲劳性能钢索研制  

FATIGUE PROFORMANCE EVALUATION OF FAST CABLE-NET STRUCTURES AND DEVELOPMENT OF A NEW TYPE OF STEEL CABLE SYSTEM WITH HIGH FATIGUE RESISTANCE

作　　者：姜鹏[1,2] 朱万旭 刘飞[4] 王启明[1,2] 岳友岭[1,2] 钱磊[1,2] 南仁东[1,2] 朱忠义[4] 郭正兴[5] 黄颖 罗斌[5] 

机构地区：[1]中国科学院国家天文台,北京100012 [2]中国射电天文重点实验室,北京100012 [3]柳州欧维姆机械股份有限公司,柳州545005 [4]北京市建筑设计研究院有限公司,北京100045 [5]东南大学土木工程学院,南京211189

出　　处：《工程力学》2015年第9期243-249,共7页Engineering Mechanics

基　　金：国家自然科学青年基金项目(11303059);中国科学院青年创新促进会人才基金项目;国家自然科学基金项目(11173035)

摘　　要：500 m口径射电望远镜(FAST)采用柔性索网作为主要支承结构,变位观测过程中索网将长期承受高达500MPa的疲劳载荷,约为目前相关标准规范规定值的两倍。索网结构将是该望远镜系统的关键易损部件,故该文主要开展如下工作:1)根据望远镜的科学目标,估算未来30年望远镜的观测轨迹,评估望远镜运行观测对索网结构疲劳性能的要求;2)结合环氧涂层技术和改进挤压锚固工艺研制高疲劳性能钢索结构,并通过实验验证该种钢索结构可以满足该望远镜对索网结构的技术要求。The five hundred-meter Aperture Spherical Radio Telescope （FAST） is supported by a cable-net structure, whose form changing operations would lead to about 500MPa of stress range. This stress range is more than twice that defined by the codes regarding cable-net structures. Thus, the cable-net structure is the most critical and fragile part of the FAST reflector system. Therefore, the present paper mainly focuses on the following two aspects. 1） Based on the estimated tracking trajectory of this telescope during its service life, finite element methods were used to clarify the fatigue resistance requirements for the cables used in this telescope. 2） A new type of steel cable system was developed, one with fatigue resistance and durability capable of meeting that requirement.

关 键 词：FAST工程 索网结构 疲劳性能 有限元分析 射电望远镜 

分 类 号：O39[理学—工程力学]